You say ptO, I say Pto.
D000818:Animals; D001483:Base Sequence; D005796:Genes; D016678:Genome; D008025:Ligases / Q000235:genetics; D051379:Mice; D009626:Terminology as Topic; D044767:Ubiquitin-Protein Ligases
D044767:Ubiquitin-Protein Ligases; D008025:Ligases